“…Some of the causes of increased postoperative LOS are modifiable while others are not. Previous studies of risk factors associated with prolonged LOS after arthroplasty describe female gender, increasing age, comorbidities, obesity, higher American Society of Anesthesiologists-Physical Status scores, longer incisions, longer operative time, the need for transfusion, and postoperative complications as being associated with increased LOS [2,3,5,7,[10][11][12].…”